Determination for uci multiplexing

Abstract

This disclosure provides systems, methods, and devices for wireless communication that support physical uplink control channel (PUCCH) resource set determination for multiplexing uplink control information (UCI) messages of different priorities in a wireless communication system. In particular, a user equipment (UE) determines to multiplex a high-priority (HP) UCI message of a first size and a low-priority (LP) UCI message of a second size for a multiplexed PUCCH based on a reference UCI payload size different from a sum of the first and second sizes. The reference UCI payload size is based on a sum of the first size and the second size with a weight factor applied to the first size, second size, or both, or is based on a sum of the first size and a reference second size. The resource set from which the multiplexed PUCCH resource is selected is determined based on the reference UCI payload size.

What is claimed is: 
     
         1 . A method of wireless communication performed by a user equipment (UE), the method comprising:
 determining to multiplex a high-priority (HP) uplink control information (UCI) message having a first size and a low-priority (LP) UCI message having a second size for a multiplexed physical uplink control channel (PUCCH) transmission;   determining a reference total UCI payload size based on the first size of the HP UCI message and the second size of the LP UCI message, wherein the reference total UCI payload size is different from a sum of the first size and the second size;   determining, based on the reference total UCI payload size, a resource for the multiplexed PUCCH transmission including the HP UCI message and the LP UCI message; and   transmitting, to a network entity, the multiplexed PUCCH transmission in the resource.   
     
     
         2 . The method of  claim 1 , wherein determining the reference total UCI payload size based on the first size of the HP UCI message and the second size of the LP UCI message includes calculating a weighted sum of the first size and the second size based on at least one weight factor. 
     
     
         3 . The method of  claim 2 , wherein calculating a weighted sum of the first size and the second size based on at least one weight factor includes one of:
 applying the at least one weight factor to the second size and adding a result of applying the at least one weight factor to the second size to the first size to determine the weighted sum;   applying the at least one weight factor to the first size and adding a result of applying the at least one weight factor to the first size to the second size to determine the weighted sum; or   applying a first weight factor of the at least one weight factor to the first size and a second weight factor of the at least one weight factor to the second size, and adding a result of applying the first weight factor to the first size to a result of applying the second weight factor to the second size to determine the weighted sum.   
     
     
         4 . The method of  claim 3 , wherein:
 applying the at least one weight factor to the first size includes obtaining a weighted first size based on the at least one weight factor and rounding the weighted first size to a first integer value; and   applying the at least one weight factor to the second size includes obtaining a weighted second size based on the at least one weight factor and rounding the weighted second size to a second integer value.   
     
     
         5 . The method of  claim 2 , further comprising obtaining the at least one weight factor by selecting the at least one weight factor from a plurality of radio resource control (RRC)-configured values based on a range of the first size and a range of the second size. 
     
     
         6 . The method of  claim 2 , further comprising obtaining the at least one weight factor by calculating the at least one weight factor based on a ratio of a coding rate associated with the LP UCI message to a coding rate associated with the HP UCI message. 
     
     
         7 . The method of  claim 6 , wherein the coding rate associated with the LP UCI message is determined based on a coding rate of a PUCCH resource over which the LP UCI message is originally scheduled to be transmitted, and wherein the coding rate associated with the HP UCI message is determined based on a coding rate of a PUCCH resource over which the HP UCI message is originally scheduled to be transmitted. 
     
     
         8 . The method of  claim 2 , further comprising obtaining the at least one weight factor by selecting the at least one weight factor from a plurality of radio resource control (RRC)-configured values based on a range of the first size and a range of the second size when the sum of the first size of the HP UCI message and the second size of the LP UCI message is within a first range, and calculating the at least one weight factor based on a ratio of a coding rate associated with the LP UCI message to a coding rate associated with the HP UCI message when the sum of the first size of the HP UCI message and the second size of the LP UCI message is within a second range different from the first range. 
     
     
         9 . The method of  claim 1 , wherein determining the reference total UCI payload size based on the first size of the HP UCI message and the second size of the LP UCI message includes calculating a sum of the first size and a reference second size, wherein the reference second size is different from the second size of the LP UCI message. 
     
     
         10 . The method of  claim 9 , wherein calculating the sum of the first size and the reference second size for determining the reference total UCI payload size includes excluding the second size of the LP UCI message in the sum of the first size and the reference second size. 
     
     
         11 . The method of  claim 10 , wherein determining the reference total UCI payload size based on the first size of the HP UCI message and the second size of the LP UCI message includes calculating a sum of the first size and a reference second size when the LP UCI message includes a dynamic Type  1  hybrid automatic repeat request (HARQ) feedback message. 
     
     
         12 . The method of  claim 9 , wherein the reference second size is one of:
 a fixed integer value;   a quantized reference value; or   a rounded value relative to the second size of the LP UCI message.   
     
     
         13 . The method of  claim 12 , wherein the quantized reference value is obtained by:
 configuring a set of reference integer values;   selecting an intermediate reference second size; and   rounding the intermediate reference second size to a largest value from the set of reference integer values that is less than the intermediate reference second size to obtain the quantized reference value.   
     
     
         14 . The method of  claim 12 , wherein the rounded value relative to the second size of the LP UCI message is obtained by:
 obtaining a ceiling of a ratio of the second size of the LP UCI message to a rounding factor; and   multiplying the ceiling of the ratio of the second size of the LP UCI message to a rounding factor by the rounding factor to obtain the rounded value.   
     
     
         15 . The method of  claim 9 , further comprising:
 determining a total number of resource blocks (RBs) to be used for the transmitting the multiplexed PUCCH transmission in the resource based, at least in part, on the first size of the HP UCI message and the reference second size.   
     
     
         16 . The method of  claim 15 , wherein determining the total number of RBs includes:
 calculating an LP RB size based on the reference second size and a coding rate associated with the LP UCI message;   calculating an HP RB size based on the first size of the HP UCI message and a coding rate associated with the HP UCI message; and   obtaining the total number of RBs to be used for the transmitting the multiplexed PUCCH transmission in the resource based on a sum of the LP RB size and the HP RB size.   
     
     
         17 . The method of  claim 16 , wherein:
 calculating the LP RB size includes determining an integer number of RBs for the LP UCI message; and   calculating the HP RB size includes determining an integer number of RBs for the HP UCI message.   
     
     
         18 . The method of  claim 16 , wherein the calculated LP RB size is a non-integer value and the calculated HP RB size is a non-integer value, and wherein obtaining the total number of RBs includes rounding the sum of the LP RB size and the HP RB size to an integer value. 
     
     
         19 . The method of  claim 1 , wherein determining the resource for the multiplexed PUCCH transmission includes:
 determining, based on the reference total UCI payload size, a resource set; and   selecting, from the resource set determined based on the reference total UCI payload size, the resource for the multiplexed PUCCH transmission.   
     
     
         20 . A method of wireless communication performed by a network entity, the method comprising:
 determining a configuration of at least one resource set including at least one resource configured for a multiplexed physical uplink control channel (PUCCH) transmission, from a user equipment (UE) to the network entity, that includes a high-priority (HP) uplink control information (UCI) message having a first size and a low-priority (LP) UCI message having a second size, the configuration of the at least one resource set based on a total UCI payload size range associated with a reference total UCI payload size that is different from a sum of the first size and the second size;   transmitting, to the UE, the configuration of the at least one resource set including the at least one resource configured for the multiplexed PUCCH transmission from the UE; and   receiving, from the UE, the multiplexed PUCCH transmission in the at least one resource of the at least one resource set.   
     
     
         21 . The method of  claim 20 , wherein the configuration of the at least one resource set includes at least one weight factor for calculating a weighted sum of the first size and the second size by the UE, wherein the UE is configured to determine the resource set from which to select the resource for the multiplexed PUCCH transmission, or to determine the resource for the multiplexed PUCCH transmission, by determining the reference total UCI payload size based on the weighted sum of the first size and the second size based on at least one weight factor. 
     
     
         22 . The method of  claim 21 , further comprising:
 transmitting, to the UE, a plurality of radio resource control (RRC)-configured weight factor values, wherein each weight factor value of the plurality of RRC-configured weight factor values is associated with a range of the first size and a range of the second size.   
     
     
         23 . The method of  claim 21 , wherein the at least one weight factor is based on a ratio of a coding rate associated with the LP UCI message to a coding rate associated with the HP UCI message, wherein the coding rate associated with the LP UCI message is determined based on a coding rate of a PUCCH resource over which the LP UCI message is originally scheduled to be transmitted, and wherein the coding rate associated with the HP UCI message is determined based on a coding rate of a PUCCH resource over which the HP UCI message is originally scheduled to be transmitted. 
     
     
         24 . The method of  claim 20 , wherein determining the configuration of at least one resource set includes:
 configuring the at least one resource set to be associated with the reference total UCI payload size, the reference total UCI payload size based on a sum of the first size of the HP UCI message and a reference second size, wherein the reference second size is different from the second size of the LP UCI message.   
     
     
         25 . The method of  claim 24 , wherein the sum of the first size and the reference second size excludes the second size of the LP UCI message in the sum of the first size and the reference second size. 
     
     
         26 . The method of  claim 25 , wherein the LP UCI message includes a dynamic Type 1 hybrid automatic repeat request (HARQ) feedback message. 
     
     
         27 . The method of  claim 24 , further comprising:
 determining a total number of resource blocks (RBs) to be used by the UE for the multiplexed PUCCH transmission based, at least in part, on the first size of the HP UCI message and the reference second size.   
     
     
         28 . The method of  claim 27 , wherein determining the total number of RBs includes:
 calculating an LP RB size based on the reference second size and a coding rate associated with a PUCCH resource over which the LP UCI message is originally scheduled to be transmitted;   calculating an HP RB size based on the first size of the HP UCI message and a coding rate associated with a PUCCH resource over which the HP UCI message is originally scheduled to be transmitted; and   obtaining the total number of RBs to be used by the UE for the multiplexed PUCCH transmission in the resource selected from the resource set based on a sum of the LP RB size and the HP RB size.   
     
     
         29 . An apparatus for wireless communication at a user equipment (UE), the apparatus comprising:
 at least one processor; and   a memory coupled with the at least one processor and storing processor-readable code that, when executed by the at least one processor, configures the UE to perform operations including:
 determining to multiplex a high-priority (HP) uplink control information (UCI) message having a first size and a low-priority (LP) UCI message having a second size for a multiplexed physical uplink control channel (PUCCH) transmission; 
 determining a reference total UCI payload size based on the first size of the HP UCI message and the second size of the LP UCI message, wherein the reference total UCI payload size is different from a sum of the first size and the second size; 
 determining, based on the reference total UCI payload size, a resource for the multiplexed PUCCH transmission including the HP UCI message and the LP UCI message; and 
 transmitting, to a network entity, the multiplexed PUCCH transmission in the resource. 
   
     
     
         30 . An apparatus for wireless communication at a network entity, the apparatus comprising:
 at least one processor; and   a memory coupled with the at least one processor and storing processor-readable code that, when executed by the at least one processor, configures the network entity to perform operations including:
 determining a configuration of at least one resource set including at least one resource configured for a multiplexed physical uplink control channel (PUCCH) transmission, from a user equipment (UE) to the network entity, that includes a high-priority (HP) uplink control information (UCI) message having a first size and a low-priority (LP) UCI message having a second size, the configuration of the at least one resource set based on a total UCI payload size range associated with a reference total UCI payload size that is different from a sum of the first size and the second size; 
 transmitting, to the UE, the configuration of the at least one resource set including the at least one resource configured for the multiplexed PUCCH transmission from the UE; and 
 receiving, from the UE, the multiplexed PUCCH transmission in the at least one resource of the at least one resource set.